Have both cams and fixing to do my re-build, but I am wondering, which cam should I put back in the car? I would like to go bigger but I cant afford that yet, so which one?



Mike

 

if you had to choose just between the two, then the 305...you should also look into the 224/230...

 

Let me ask this, can the cc306 be used with stock heads and 1.5rr's? I might sell these cams and look into the cc306 or gm847!

 

yes it can...847

 

can either of these cams pass emissions with stock heads?? how about with ported stock heads??

david

 

what is the lift with the 1.5 rr's on the cc306 or gm847?

 

not so much...

 

GM 847

.539 .558 w/ 1.5

 

For an everyday driver, which cam gm847 or cc306
and the cc306, what is the lift on 1.5rr's?



-Mike

 

mike do you like the 305 or did it just seem too small?? to figure total lift you multiply the rocker ratio times the lobe size (the actual lift from just the cam lobe). for example the cam lobe on your 305 intake and exhaust is .340" multiplied by 1.5 gives a total lift of .510". step up to a 1.6 rocker and you get .544" at the valve. i know you didnt ask how that works but i thought i would throw it out there.

david

 

The 305 is great actually.... has a real nice lope to it. My thinking is.... if I have the 305 and the LT4 hotcam, why not sell the two and get a cam thats bigger and better since I have the shortblock out? agree?

 

I think the CC305 is a pefect match for stock heads.

Personally, you see comparable times from the CC305 and the XE224/230 and other larger cams on stock heads.(except the custom grinds, but they normally require specific other valvetrain components.)

If I were you, I'd sell the Hotcam and the 1.5 RR's and buy a set of 1.6RR's and springs. That will get you a decent boost in HP with the CC305, and maybe a little more lope. Then if you ever did heads/cam, you have the 1.6RR's already.

Just my thoughts.

Dan

 

224/230

 

224/230